en.wikipedia.org/wiki/Octagon

In geometry, an octagon is an eight-sided polygon or 8-gon. A regular octagon
has Schläfli symbol {8} ...

www.coolmath.com/reference/polygons-08-octagons

Properties of octagons, interior angles of octagons Polygons: Properties of ... To
find the sum of the interior angles of an octagon, divide it up into triangles.

study.com/academy/lesson/octagon-in-geometry-definition-properties-formula.html

Octagons appear in real life in all sorts of places: architecture, engineering, and
even nature. In this lesson, explore the properties of an octagon, learn how to ...

www.mathsisfun.com/geometry/octagon.html

Octagon. An octagon is an 8-sided polygon (a flat shape with straight sides).
Regular ... octagon regular, octagon irregular octagon concave ... Properties.

www.tutorvista.com/content/math/octagon/

A polygon which has 8 sides is known as an octagon. It is a two-dimensional
closed shape. The word "octagon" is made up of octa + gonia which are Greek ...

math.tutorvista.com/geometry/octagon.html

Octagon Properties. Given below are some important octagon facts: The number
of octagon diagonals is 20. The sum of all interior angle = 1080 degrees.

www.mathopenref.com/octagon.html

... dragging any orange dot. By clicking on the top left command line, you can
switch it between a regular and irregular octagon. ... Properties of regular
octagons ...

www.math.com/tables/geometry/polygons.htm

Sides. Name. n. N-gon. 3. Triangle. 4. Quadrilateral. 5. Pentagon. 6. Hexagon. 7.
Heptagon. 8. Octagon. 10. Decagon. 12. Dodecagon ...

www.bbc.co.uk/schools/gcsebitesize/maths/geometry/polygonsrev4.shtml

Angle properties of polygons. In your exam, you might be asked to ... What is the
sum of the interior angles of an octagon? toggle answer. Answer. Did you get ...

magoosh.com/gre/2016/diagonals-of-a-regular-octagon-in-gre-geometry/

Sep 7, 2016 ... Students love to skip over the basics, asking questions like: How many vertices
does an octagon have? How many diagonals does an octagon ...